https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122215
--- Comment #16 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Vladimir Makarov <[email protected]>: https://gcc.gnu.org/g:2b83c489ca8ac24b3fb8b1214ec83f85f9beeedb commit r16-5924-g2b83c489ca8ac24b3fb8b1214ec83f85f9beeedb Author: Vladimir N. Makarov <[email protected]> Date: Fri Dec 5 14:21:38 2025 -0500 [PR122215, IRA]: Fix undefined behaviour of improve_allocation Register filters are used in one loop of improve_allocation to ignore some hard regs for cost calculation but it is missed in the subsequent loop using the costs. This results in usage of random (undefined) register costs and in sporadic code generation for riscv32 which uses the filters. gcc/ChangeLog: PR rtl-optimization/122215 * ira-color.cc (improve_allocation): Use register filter for all loop on hard regs. gcc/testsuite/ChangeLog: PR rtl-optimization/122215 * gcc.target/riscv/pr122215.c: New. * lib/target-supports.exp (check_effective_target_valgrind): New.
